Os オスミウム

Alloy of osmium and iridium extends the durability of fountain pens.

Some fountain pen nibs use osmium alloy at the tip (pen point) of the nib.
(Those with a high osmium content are called osmiridium, while those with a high iridium content are called iridosmium.)
For a smooth writing experience, appropriate elasticity and smoothness of the nib are required, as these are essential for fountain pens. Osmium alloy pen points have high acid resistance and wear resistance, allowing them to be used for many years with unchanged writing quality.

※We do not handle osmium alloy.